Water-cooled valve for internal-combustion engines.



T. L. STURTEVANT.

WATER COOLED VALVE FOR NTERNAL COMBUSTION ENGINES.

Patented June 13, 1916.

APPLlCATlON FILED MAY 21, 1914.

*Wsmm: V a 272 a M W- chum-m and be fixed thereto.

THOMAS LEGGETT QIURTEVAIIT. 0F QUINCY, MASSAC. S'IUR'IEVAIIT IllILL COMFANY. A CORPOBETIO :IUS'E'LTS, ASSIGNOR- TO 1*] OF EVIAINE.

WATER-COOLED VALVE- ?GR INTERNAL QOMBUSTXON ENGINES,

Specification of Letters Patent.

Patented J une 13, 1916,

Application filed may il, 1914. Serial 'i'c. 340K372.

To all whom it may concern Be it known that I, Tnotsus L. Sin'irrs VANT, a citizen of the United States, residing at Quincy, in the crmnty of Norfolk and State of Massachusetts, have invented or discovered certain new and useful Improvements in \Vatel--Cool':d Valves for .lntcn rial-Combustion Eiwines, of which the fob lowing is a specification, reference being had therein to the accompanying drawing.

This invention relates to water cooled valves for internal combustion engines. and has for its object to provide a valve of this character which is of simple construction, which is eliective in operation, and which embodies certain features of convenience for regulating the operation of the valve.

In the accompanying drawing l igure l is av vertical sectional view of the valve and, valve cage embodying the present invention. Fig. 2 is a detail view illustrating a. modified form of flexible tube connection by which water may be supplied to thehollow valve stem from the water jacket of the engine cylinder. Figs. 3 and "it are detail views of a preferred form of cap.

Referring to the drawings, 12 denotes a cage provided with a valve seat 13, and with an extended boss 14 forming a sheath or tube which serves as a vertical bearing for a hollow valve stem 15 to which is attached a hollow valve head 16, or the said valve head may, if desired, be cast integral with said hollow stem. The boss or tube ll is preferably formed integral with the cage 12, but may be formed separate therefrom The cage 12 is adapt ed to be removably fitted or attached to the cylinder of an internal combustion engine, as, for example, the well-known Murray la Tregurtha marine engine, for which this invention is well adapted.

To the upper end of the hollow sleeve stem 15 is attached a hollow cap 17 the sleeve portion of which is screw threaded to said, valve stem and the top of which cap serves as an anvil to be engaged by a valve operating de ice tion of said cap 17 is screw threaded extern-ally for the reception of a nut 18 beor lever. The sleeve porwot-n which and the top l9 of the cage 12 Margins-ml a coil spring 20 which serves ,RF is rec n ed pcripiieraliy for the recep- Hm iii a *lulillll by which it may be turned for the ganpv ingulatiing the stress of said m an ion or anvil portion of the is fornaal m oiv onal for t rovcption of at in s u or 1 said. can. the al e threaded uiilllCf'ilOll, by means of a we porliou :12. with the lower end the hollow valve stem. said sleeve portion til iving l'orniul square or polygonal {or the rec ption of a wrench by which the valve may he held when the hollow cap 1.?

is to be srreu'etl or unscrewed.

Abe hollow cap 17 is provided with an in h". pipe or nipple 2:2 communicating with hollow valve stem i5 and opening at its lower end into the chamber of the hollow valve h',ll1e said inlet pipe or nipple be;- ing preferably connected by a flexible tube 1333 with the top portion of the water jacket ill of the engine cvlindcr, so that the valve may be (ooh-d by water taken from the circulation in the water jacket. The pipe '22 is preferably smaller in diameter than the diameter of the bore of the hollow valve stem 15 that water lowing; in one direction through said pipe may flow in the opposite direction in said stem outside of said pipe: and the hollow cap 17 is provided with a discharge pipe or nipple Qo through which the cooling water escapes from the hollow valve stem. This discharge pipe and nipple may, if desired, have a flexible connection with another valve stem. so that the several valves of an engine may be connected in series, thereby enabling them all to be cooled by water flowingfrom one to another; or the discharge pipe or nipple may be otherwise connected toany suitable point of discharge. The circulation of water through the 'alve will preferably be lfected by the water pressure of the circulating pump of the water-cooling system of the engine, but it will be understood that the cooling water may be supplied under pressure to the inlet to the valve stem from an independent force pump or pressure system.

Mounted on the cage 12 is an oil pipe 26 which connects a pressure oil cup 27 with a duct 28 formed in said cage, so that the bearing for the valve stem, afforded by the boss or sheath 14, may be properly lubricated, the pressure oil cup being connected with any suitable oil pressure supply.

Instead of connecting the inlet pipe or nipple 222 with the water jacket of an engine cylinder by means of a flexible tube 23 such connection may be made by a pipe 29 having suitable packed joints, at 30, as will be understood from the detail view Fig. 2, and which jointed pipe afi'ords such a flexible connection as will admit of an uninterrupted circulation when thevalve is in operation.

From the foregoing it will be apparent that the parts comprising the present improved water cooled valve construction are all carried by the cage 12 which is adapted to be removably placed in or on the engine cylinder, so that all of said parts may he supplied to or removed from the engine cylinder as a unit; while the construction is such that the valve stem may be properly lubricated and the pressure of the valve spring.

conveniently adjusted, according to require ments. Of course it will be understood that when the valve is to be removed from the engine the flexible tube connecting the hollow valve stemwith the water jacket of the cylinder will be disconnected.

instead of making the inlet and outlet pipes or nipples separate from the hollow cap 17 and screwing them into or brazing them to said cap, as shown in Fig. l, the

- said pipes or nipples 22 and respec- ,tivcly, may be cast integral with said hollow cap, as shown in Figs. 3 and 4, thereby avoiding joints which might leak, and reducing cost of construction. In this form of cap the circulation pipe 22 is preferably at tached to the cap 17 by being screwed into said cap, as shown in Fig. 4.

lly obtaining the water supply of the water cooled valve from the top porti n of the water jacket of the engine cylinder the formation ol a steam pocket in the said water jacket is avoided. This is an important matter, in that the bubbles of air or steam, which are likely to form so-called pot-hots" in the top partsoi' the water jackcts f engine cylinders, are witlnlrawn, and which pockets are liable to hold the circulating water away from the parts to be cooled. so that by thus taltinfl the cooling Water from the top part oi the water jacket of the oginr and forcing the same under pressuw through a closed c nduit between the cit-lino rjv'lindcr Water jacket and said nal combustion engines, comprising a cage afi'ording a valve seat, a hollow valve fitted to said seat, a hollow stem to one end of which said valve is attached, a hollow cap removsbly attached to the other end of said stem concentric therewith and provided with inlet and discharge pipes or nipples, an inlet pipe extending from said inlet nipple to the chamber of said hollow valve, said pipe being smaller in diaineter than the bore of said hollow stem, a boss or tube fixed with relation to said cage, a valve-closing spring disposed between said cage and said cap and encircling said boss or tube, and an adjustable nut on said cap for regulating the tension of said spring.

2. A water cooled valve device, for internal combustion engines, comprising a cage affording a valve seat, a hollow valve fitted to said seat, a hollow stem to one end of which said valveis attached, a concentrically mounted hollow cap reinovably attached to the other end of said stem and provided with inlet and discharge pipes or nipples, a pipe extending from said inlet nipple to the chamber of said hollow valve, said pipe being smaller in diameter than the bore of said hollow stem, a boss or tube fixed with relation to saidcage and affording a threaded connection with the lower end of said valve stem, said sleeve portion being formed square or polygonal for the K308i)- tion of a Wrench, and a hollow removable cap having a screw-tlnwznled connection with the upper end of said valve stem, said cap having a portion also formed square or polygonal for the reception of a wrench, when-by the said cap may be conveniently removed. when desired, and the valve stem to he held from turning movements by a. wrench to be applied to the sleeve portion of the valve. 7

4. In a water coo ed valve construction, the ci'unhination with a hollow valve and hollow valve stem, of an engine cylinder water iaclict, a closed conduit between the top part; of said water jacketand the said alve, whereby the latter may be cooled by water forced under pressure directly from the top part uf-said water jacket, an ex- ;ended bearing for said valve stem, and means for forging a lubricant into said bearmg;

In testimony whereof I affix my signature, 1n presence of two wltnesses.

THOMAS LEGGETT STUR'IEVAN'I.

\Vitnesses:

\VILLIAM T. Dm'uz, FLORA I). HECKER. 

